Antiskid tire



WxEsEFe. JR

ANTSKID TIRE Filed May ll, 1925 Patented Nov.y i

UNITED STAT-ns HEINRICH WIESER, JR.,

0F MUNICH, GERMANY.

ANrIsxIiJ TIRE.

Application led Hay 11, 1925, SerialNo. 29,415, and in Germany October 3, 1924.

The present invention has reference to improvements in antiskid tires for bicycles and motorcycles, and relates more specifically to a new formation of tread to be used in connection with a single tube type of tire or with a closed tbeuand casing type, andv the particular object of the invention 1s to provide a tire tread which will effectively!v hold the Wheel on the ground without side# slipping, vWhether in the relative vertical position when running straight ahead, or in angularly inclined or tilted position when negotiating curves. l

My invention will readily when described in connectionvwith'l the accompanying drawing, in which Fi 1 isa` in connection with atwopart tireiiQOI-fv.

Prising the Casing 01' 5h06 l1; and th vinner closed tube 1.- Y

The tubular casing lpresents three mergzing annular basal treadzonesor striped,-y

and c relatively angularl'yy extending" as shown in Fig, 1. From the lateral tread' bases b and c extend radially directed. I rrlti-ffii skid members r of preferably triangularf cross-section, forming parallel annular. corv rugations, Whilst the middle zone a is-solid-l ly extended to form a comparatively wide flat tread annulusl a.. Care must beftaken in this arrangement that the. .outermost points of the members r all` extend in the same plane in each zone, as shown by dotted outline in Fig. 1. Y

The elect of the described tire structure is as followsr-U n the tire movingv in nord mal `vertical position' over a road surface such as presented by most of the country roads,be1t dry, sandy and yielding, or moisture-softened and slippery, the solid middle tread zone a flatly contacts with the road and affords by reason of itsrelative width a good purchase thereon, yet absorbs but little of the motive power as it prevents the Fig..,

' vlrespondingl shaped bore and an outer wall and the bases and `api'ses o corrugations lying .in straight parallel inthen the corrugations 7' at once are brought in to contact with the road surface and roll- Vingly bite into it so that slipping is `effectivelylrevented.` n running -perp'endicularly over the ordinary road hazards, such as rail crossings,

depressions, soft spots, rills, and the like, the lateral lantiskid annuli or corrugations co'- operate with the flat middle tread zone -in negotiating these obstacles to'hold the wheel to its course.

'What I clailr "s: A An anti-skidxtire structure of the charac- .ter set forth comprising a tubular member having a circular inner wall forming a corprovided Wlth flat side faces diverging' outwardly beyond the central transverse line of the bore to vprovide a tread portion of greater wi-dth than vthe diameter of the re-I ma-inder; of the tubular member, said, at.

lside faces terminating at, their outerfedgea on .agtrans'verse line lsubstantially coinftliclentv Q-withz-tl outer peri hery of the, .outer`,j,fwalll- ,fof thebore, and sai tread, port'onf'presen .ing a iniddle tread'surfacey' v U verselyla-t tread strips and two latera Wies .tre

surfaces disposed at` oblique-angle middle-'tread surface, eachlatera r'eadlsur' face'ihaving a series :of annular' concentric l' the lateral v1i1ar-gins"of 'the "middle tread stripsfand' outer edge' of theiat side face at thev adjacent side 'of the -tire,'fsaid corrugations being of substantially prismatic shape each series of ner-and `outer"1planes,=, both oblique to the middle v,tread strips, the said outer edges of HEINRICH Winsen, .ne

corrugations projecting therefrom between I 

